Biology Practicals Class 12
Study of Air Pollutants
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- The learner will be introduced to the laboratory method of air quality analysis through this biology experiment.
- In this biology simulation, learners will understand that there is a change in air quality depending on the environment.
- This biology practical helps learners to understand the terms like pollution, pollutants, particulate matter, etc.
- Through this biology simulation, users can virtually perform the techniques which otherwise would require the user to go on the field.
- Calculations for suspended particles in the air are explained in a lucid manner.
- Learners will understand about types of air pollutants i.e. primary, secondary and tertiary pollutants in the theory section of this biology practical.
Pollutants are substances that produce contamination in the environment. Pollution occurs when pollutants are introduced into the natural environment that is hazardous to humans, animals, and plants. Foreign substances or naturally occurring pollutants both constitute pollutants.
In this biology practical class 12, we’ll learn about air pollutants and how it affects air quality. The contamination of the air or release of air pollutants is due to particles, smoke, or toxic substances entering the atmosphere. Certain air pollutants are harmful, making it tough for plants, animals, and humans to survive.
Due to automotive exhausts and industrial emissions, the atmosphere in densely inhabited places is heavily laden with dust, smoke, and suspended specific matter. As a result of severe air pollution, humans suffer from severe respiratory and cardiovascular ailments. Through this biology simulation, learners can virtually perform the techniques which otherwise would require the learner to go on the field.
The commonly found contaminants in the air are;
- Carbon monoxide is a gas produced by combustion reactions.
- Nitrogen Dioxide gas is produced by power plants, fuel combustion, and wood combustion.
- Emission of lead into the air is due to metal refineries, battery production, volcanic eruptions, sea spray, and bushfires.
Ground-level ozone is a secondary pollutant. It is created when nitrogen oxides and volatile organic compounds react chemically in the presence of sunlight.
Particulate matter is the total of all extremely minute particles and liquid droplets floating in the air. Chemical reactions, fuel combustion (e.g., coal, wood, diesel), industrial activities, and farming (ploughing, field burning) all contribute to particulate matter formation.
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Requirements for this Science Experiment
⦁ Polythene Bag ⦁ Petroleum Jelly ⦁ Twine Thread ⦁ Weighing Balance